Girder for reinforced concrete structures.



,APPLIOATION FILED 0C|T.1T,l907.

Patented Jan. 19, 1909.

3 SHEETS-SHEET l.

c 1.5/ n, @n

G. M. GRAHAM.

GIBDEB FOR RBINl-ORCED GONURBTE STRUCTURES.

APPLIUATION Hmm oomlv. 1997.

91 O, 124.' Patented Jan. 19, 1909.

3 SHBETS-BHEBT Z.

. G. M. GRAHAM.

GIBDBR FOR RBINIORGED CONCRETE STRUCTURES.

APFLIGATION FILED 0OT.17, 1907.

Patented Jan. 19, 1909.

(i /Y/Miyf@ provision ss- Unilrnn sri-tres nirnnr ormoni.

GEORGE M 1TH A HAM. 0l." CHICAGO. ILLINOIS, ASSIGNHL Tl.) G, A lill'WARU KOl-llll'lli, 0I" (Hilti/MJU, ILLINOIS'. 4

GIRDER FR REINFORCED CONCRETE STRUCTURES.

Tp scicntion. of Lettere Potent,

rimmed Jun. 1e, loon.'VV

Application illed October li, 1805'. JSerial No. 397,847.

To uit whom 'it 'may concern. y

lle it known that I, Guiones M. GRAHAM, :i citizen of the United Sintes; of America, und e resident of Chicago, in the county oi' Cook and State oi Illinois, have invented certain new and useful improvements in (lirders for Rein forced Concrete Structures, olf 'which the following e specification.

lliis invention relates girders for use in reinforced concrete structures in which thc girders are Wholly embedded in the mass of concrete which constitutes the main portion olf the structure And the prese-ut improvement lies for its object to provide a. simple und eilicient struc 'tural arrangement and combination of parts whereby a. light, Strong and economical truss gircler is provided for such purposes, and which is adapted for ready and economie/el assemblage of the )arts in the skeleton sup orting frame oi e reinforced. concrete iuilding, all its will hereinafter more fully op ear.

.n the accompanying drawings z-li`igure l, is a. side elevation illustrating the resent fri-rder in place in. the skeleton rein-.orcing iframe of e. reinforced concrete Fig. 2 is a sectional rpien of the seme. Fig. 3 is an enlarged ifregi-nentary side View. Fig. 4- is s. transserse sect-ion on line :1i-w, Fig. 3. Fi 5 is en enlarged detail side View of amend fittingrvof the i.rdel. Fig. 6 is a sectional glen yiew of t line 'w/.p and. on' line m2-2 Fig. 5. Fig. 7 is an enler .dI-,transverse section of the oentral part o the girder.

Similar numerals of reference indicate like parts in the several views.-

Rcferring if) the drawings, 1 represents an outer vertical member, and 2 an outer horizontal member of the skeleton frame of 'concrete building, such es .set Letters Patent No. 8653490 e reinforced forth in my prior of Sept. 10, 1,907.

3 are ttingsfby which the aforesaid meinbers are connected togetherand which also .affords a. support end-connection for the u per sind lower longitudinal members of t o truss girder hereinafter described. Such fttingsre of su tantially the same construction as that s, forth in my former patent No.. 865,48910 Sept. 10, 1907 the novelty in the present construction comprising ,the 'of 'lateral brackets on opposite sides of the ting for the support. and at to tubular trusscd building.,

e same partly onV l l I l i i i l mcluncot ol' the diagonal bmw rods of the truss girdcr hereinafter described. Such runner lnfnolrets muy be of 'en usual and suitable construction, but reernbly oor`ri prise integrally formed stu .s fl on the sides of the fitting and seperate runner brackets 5 recessed to lit over said studs, end secured in. place by holdin r bolt 6 .ussin through Central orifices in oth studs ambfruekts, as sii-own more particularly in Fig. 6- of the drawin 7 nur? are the upper and lower tnbnler longitudinal members ofy the truss girdefr, supported et their respective ends in open top sockets formed therefor on, the fitting 3, and having a seed reletion es shown in Figs. l, 3,11 and of the drawingsA S is a vertical post or strut errenged be tween the longitudinal members 7 find- 8,

midway their length, and provided with to@ bers, cach comprising e pair members inclined in opposite directions and hnving their.V loo ed aforeseid'runner rockets' 5 ort l l the upper fitting" 3 aforesaid, itl'ii'levkllroir middle portions engage the 'ndcif 'of c bracket or shoe amm meer roof don the niederA side of the .lower lontu 'nalgtriislsingenlber 8 midway the lengt of the sufrieron ably below the ost @als Sl'rown.` ,u

11 is the brecet or shoe 'above referred to, und 'which in its preferred' form es il'l'iisd tinted in Fig. 7, comprises 'tliej'hoe or 'bracket 1I an intenedietetlirus't bloclij 12 in loose bearing contentzwith `the underside, of the truss rnti'rnbe'r djfoVseris of ad? 11 aml "havin bearil ,nndersidt of tl're thrust' look"1'9,'tle function ofwliich is to move the shoeV away from the thrlst block after the gixtler parte ardaembied, to impose tension of the required stresi'ipjqd; the diagonal tension members t 14 and 15 are upper :and lower lo im dine-l bearings of runner strips,` having ai# its remaintre rit "of the such tension members comprisinging` on the u per surface of the upper longiu inal gir er member 7 and on the lower surface of the lower longitudinal girder member 8 respectivelyh an formed with a series of runner lugs 16 and 17 projecstin uc Y and having bearing uppn the runner strips- 14 and 15 and around t e runner lugs 16 and 17 thereof, 4and attached at the respective ends of the truss girder to the end thereof, or continuedl to form the iagonal bracing of an immediately adjacent girder which may be arranged in right an le rela tion to the one uppn which the iagonalA bracing is first app 'ed. L

20is a sectional casing ada ted to inclose the (girder just described an constitutes a mol cavit for the reception of the mass of concrete w 'ch forms the main body o'f the Apresent reinforced concrete girder of a uilding.

Having thus fullyr 'described m vention what I claim as new an secure by Letters Patent, isz- 1. A truss girder for reinforced concrete structures comprising upper and lower longitudinal truss members, an 'ntermediate strut interposed between said members, lateral attaching brackets located at the ends of the upper ongitudinal member, an intersaid indeslre to mediate shoe arranged beneath the lower.

longitudinal member, and a pair of diagonal tension members arranged at opposite sides of the girder and extending from the ends d der a'nd beneath the shoe aforesai loo rods the loops of which` c n lateral attaching brackets aforesai 2. A truss girder structures comprisin gitudinal truss mem rs tubing, an intermediate strut interposed between said members, lateral attachlng brack ets located at the ends of the upper longitudinal member, an intermediate shoe 'arran beneath the lower longitudinal member, and a pair of dia nal tension members arran d at oppositesmdes of the girder and exten ing from the ends ofthe girder and beneath the shoe aforesaid,- ,such tension members comprising looped rods the loo s of which en age the lateral attaching brac ets aforesai f 3. A truss girder for reinforced concrete structures comprising upper and'lower longitudinal truss. members,

ge the two series of diagonal bracortions for reinforced concrete upper and IOWeI' 1onfOrmed of round4 diagonal an intermediate strut interposed between said members, lateral attaching brackets located at the ends of the upp'er ongitudinal member, an intermediate shoe arranged beneath the lower longitudinal member, a pair of diagonal tenslon members arranged at opposite sides of the girder and extending from the ends of the girder and beneath the shoe aforesaid such tension members comprising looped rods the loops of which engage the lateral brackets aforesaid, and means for adjustin the shoe to and from the lower longitudine member. j

4. A truss girder for reinforced concrete structures comprisin upper and lower longitudinal' truss mem tubing, an intermediate strut interposed be tween said members, lateral attaching brack-V i ets located at the ends of the upper longitudinal member, an intermediate shoe arranged beneath the lower longitudinal meinber, a dpair of diagonal tension members ar range -at opposite sides of the extending from the ends of the rder and beneath the shoe aforesaid, suc tension member comprising looped rodsthe loops of which engage the lateral brackets` aforesaid, and means for adjusting the shoe yto and from the vlower longitudinal member.

5. Al truss girder for reinforced concrete structures comprisin upper and lower longitudinal truss mem ers formed of round tubing, an intermediate strut interposed 'between said inembers, lateral attaching brackets located at the 'ends of the upper longitudinal member, an intermediate shoe arranged beneath the lower longitudinal member, a air of diagonal tension members, arrange at opposite sides of the girder and extending from the ends of the -rder and beneath the shoe aforesaid, suc tension members comprising looped rods the loops of which engage the lateral brackets 'afore said, and means for adjustin the shoe to and from the lower lon 'tu mal member, the same comprising a t rust plate and a the shoe and having bearing against thrust plate. j

6. A truss girder for reinforced concrete structures comprising upper and lower 1ongitudinal truss members, an intermediate strut interposed between s'aid members, upper and lower lpngitudinal bearing strips arranged on the top of the upper truss member and ber and l series of adjusting screws screwing through t e provided with runner lugs, and a racing of wire wound around the longitudinal members and having bearing upon the runner strips and aroun the runner lugs.

7. A truss girder for' reinforced concrete structures comprising upper and n gitudinal truss members, an intermediate strut interposed between said members,

girder and lower lone the bottom of the lower truss mem- 91o, me

.longitudinal bearing strips t top of the upper truss mem- Fier nul the. bottoni of the lower truss melu- Lr-r und prrwided with runner lugs, and mouille bracings of wire wound in crossed ralorum urourul tbe longitudinal members mrnu hearings upon the runner strips f `u ller runner luge.

pirater for reinforced concrete g iuprieing upper und lower lontir-ues: numbers, un intermediate i intm'gureeu l:e1wi-en euid members, lat- Murine-1o" brutflrete located at the ends un longituflinul member, un inune urrunifed beneath the lower longituilnul member, u puir of dirigono! tension nuuulsere arranged at, opposite sides of the firtler und enrolling from the ends of rte-r und beneath the Shoe aforesaid, reunion numbere eomprising' looped rude the loops: ot u'lsieli engage the lateral bre new uwrcreuid. upper und lower longi- :nlinul bearing stripe arranged on tbe top oi" the upper truer'` member and the bottom g5 et' :be lru'rer treue: nienxber and provided wufl: runner lun, und u diagonal bracing of une wound around the longitudinal nmol 1 und iuiri'iig beuring upon the runner stripe and around tbe runner lugs.

no nl truss girrier for reinforeed concrte relu-inria roniprieing upper and lower lon- ;juui nl trlw members, an intermediate rv-ut ini. :mi between Said members, lat- ;iftnfflnun bruultete loented at. the vends 4e upper lfuuitndinul member, sin interne arranged beneath the lower i meunier. :i pair of diagonal mln-re'- arrunged at opposite sides der and extending from the ends der und beneath the shoe aforesaid, teiwion members eornprising looped nur: ille ieri ut' wllie'n engage the lateral i 't upper and lower longiixiulinul bearing stripe arranged on the top nl' the upper trie member and the bottom member and provided i lun-u and i'nultiple bracing's of uw; fl in rrneeed relation around the tudinni truss members and having beursg upon illu runner stripe and around the i. s: glider 'l-or reinforeed concrete inuiprrinrf upper und lower lon- 1. .l @une members formed of round ihnug un intermediate strut interposed lx-elueeu uuid members. luterul attaching lu-u fte lisffnted ut tins ends of the upp \r lnugitufliunl member. nu intermediate Shoe @arranged beneath the lower longitudinal nii-rubor. e, :nur or' diagonal tension members arranged et oppor-site Sides of the girder und extending' 'from tlie ends of the girder und lwrwufb tite eline aforesaid, noch tension arsenale-r romp ng looped 'rods #he loops of whelf eugene the lateral brackets More said, upper and lower longitudinal bearing stripe` arranged on the top of the upper truss member and the bottom of the lower truss member and rovided with runner lugs, und u diagonal racing of wire wound around the longitudiuul members and luwimg;l bearing upon the runner stripe und around the runner lugs.

l1. A truss girder for reinforced eonerete .etrnetures romprieing upper and lower lon` gritudinel truss members formed of round tnlu'no'. un intermediate Strut interposed between Suid member". luteml attaching brut-Item located :it the endi ot' the upper longituf'lilml member.y un intermediute shoe arranged beneath the lower. longitudinal member. :i pair of diagonal tension members arranged et opposite sides of the girth-r und extending from the. ende of the girder .ind beneutll the eline nforeeuid. Huch tensioni member romprisiug looped rods the loop: ot whit-li engage the lateral brackets ufore- Suid, upper und lower longitudinal bearing Strips urrunged on tlie top of the upper truss: member und the bottom ot the lower truss4 member und provided with runner lugs, and multiple brneings of wire Wound in croesed relution nrounll the longitudinal truss members and baring bearing upon the runner Strips und around the runner lugs.

1:3. A truer4 rirder for reinforced ronrrete structurer; rom n'ising upper und lower lonV gitudiual trnijji members, un iutermediute strut interposel between Suid members, luterul attaching; brackets lofuted et the ends ot the uppeu longitudinal member, an inter- Tneiliute shoe arranged beneath the lower longitudinal member, a pair of diagonal tension members arranged at opposite Sides of the girder and extending from the ends of the girder und beneath the shoeafore Suid. suoli tension members comprisingr looped rods the loops ot' which engage the lateral bruekets aforesaid. means for adjusting the vrhoe to and from the lower longun-dine]l member" upper und lower longitudine-l bearing strips arranged on the top of the upper truss member and the bottom ot' the lower truss member and provided with runner lu s, and a diagonal bracing ot' wire woon around .the longitudinal memberu und having bearing upon tbe runner stripe and around the runner lugs.

if A, truss girder for reinforced concrete structures comprising upper and lower longitudmul trust,` members formed of round tubing. un intermediate etrut interposed between Huid members, lateral attaching brackets located at thev ends of the up er longitudinal member, an intermediate s oe arranged beneath the lower longitudinal meniber, u pair of diagonal tension members arrnii'ved at opposite sides of the girder und extending from the ends of the ginder und be/neuththe eline aforesaid1 suoli tension mehr her comprising looped rods the loops of which engage the lateral brackets aforesaid, means for adjusting the shoe t9 and from the lower longitudinal member, upper and lower longitudinal bearing strips arranged on the top of the upper truss member and the bottom of the lower'truss member and provided with runner lugs, and` a diagonal bracing of wire wound around the longitudinal members and having bearing upon the ruimer strips and around the runner lugs.

14. A truss girder for reinforced concrete structures comprising upper and lower longitudinal truss members, an intermediate strut interposed between said members, lateral attachin brackets located at the ends of the upper ongitudinal member, an intermediate shoe arranged beneath the lower longitudinal member, a pair of diagonal tension members arranged at opposite sides of 'the girder and extending from the ends of the girder and beneath the shoe aforesaid,

such tension members comprising looped rods the loops of which engage the lateral brackets aforesaid, means for adjustin the shoe to and from the lower longitu inal member, the same comprising a thrust plate and aseries of adjusting screws screwing through the shoe and having bearing against the thrust plate, upper and lower longitudt nal bearing strips arranged on the top of the upper truss member and the bottom of the lower truss member and provided with runner lugs, and a diagonal bracing of wire wound around the longitudinal members' and having bearing upon the runner strips and around the runner lugs.

l5. A truss girder or reinforced concrete structures comprisin upper vand lower lon gitudinal truss mem ers' formed of round tubing, an intermediate strut interposed between said mem'bers, lateral attaching brackets located at the ends of the upper longitudinal member,'au intermediate shoe arranged beneath the lower longitudinal member, a pair of diagonal tension members arranged at opposite sides of thegirder and i exten ing from the ends of the girder and beneath the shoe aforesaid, such tension member comprising looped rods the loops of which engage the lateral brackets aforesaid, means for adjustin the shoe to and from the lower longitu inal member, the same comprising'athrust plate and a series of adjusting screws screwing through the shoe and havin bearn against the thrust plate, upper an lower ongitudinal bearing strips arran 'ed on the top of the upper truss member an the bottom of the lower truss member and provided with runner lugs, and a diagonal bracing of wire wound around the longitudinal members and having bearing upon the runner strips and around the runner lu 16. A sleton reinforcing frame for oon- Vintermediate shoe arranged crete buildings comprising vertical columns, ittiii s secured thereto and forming a support or a girder, a trussed gii'der comprising upper and lower longitudinal truss members, an intermediate strut inter osed between said members, lateral attachin brackets on the sides of the aforesaid fittings, an beneath the lower longitudinal member, and a pair of diagonal tension members arranged at opposite sides of the girder and extending from the ends of the girder and beneath the shoe aforesaid, such tension members comprisin looped rods the loops of which engaget ie lateral attaching brackets afines-aid.

17. A skeleton reinforcing frame for concrete buildings comprising vertical columns, fittings secured thereto and nforming a sup-y port for agiider, a ing upper and lower longitudinal truss mehr bers formed of round tubing, lateral atw tachin brackets on the sides of the aforesaid. ittings, an intermediate strut inter posed between said members, an intermediate shoe airanged beneath the iower longitudinal member, and a pair of diagonal tension members arran d at opposite sides of the girder and exten ing from the ends of the girder and beneath the shoe aforesaid, such tension member comprising looped rods the loops of which engage the lateral at taehing brackets aforesaid.

18. A skeleton reinforcing frame for concrete buildings comprising vertical columns, fittings secured thereto and orming a support for a girder, a trussed girder compris,- ing u per and low er'longitudinal truss niembers, ateral attaching brackets on the sides of the aforesaid fittings, an intermediate strut 4interposeiifbetifireei said members, an intermediate shoe arranged beneath the lower longitudinal member, a pair of diagou nal tension members arranged at opposite sides of the girder and extending from the ends of the girder and beneath the shoe aforesaid, such` tension members comprising looped rods the loops of which engage the lateral brackets aforesaid, and means for adjusting the shoe to and 'from the lower longitudinal member.

19. A skeleton reinforcing frame for ooncrete buildings, comprising vertical columns, fittings secured thereto and fiorming a support for a girder, a trussed girder comprising upper and lower longitudinal truss inembers formed of round tubing, lateral attachinor brackets on the sides of the aforesaid fittings, an intermediate strut interposed betwceii said members, an intermediate shoe arranged beneath the Alower lon4 gitudinal member, a pair of diagonal tension members arranged at opposite sides of the girder and extendin from the ends of the trussed girder comprisn girder and beneath t e shoe aforesaid, such tension member comprising looped rods the tween Said;

. bers,

nul f tension membcm 1 5 .I laboral brackets. .2o I

lo? ltudmol member, thc somo comi* 1s] loop@ .of which engage the lateral brackets aforesaid, Vund means for udjustiu r the shoe lqocnd from the lower lougitudilui. member. ,20. A. skeleton reinforcing frame for concnete buildings comprising vertical colunuis, fittizi. secured thereto and forming a sul pont or'u girder, a, trusssed lfirdeif couiiprislng u )por and lower longitudinal truss mom- Ilotcral attaching brackets on the sides of..the aforesaid fittings, an intermediate strut interposed betwccn Suid members, un lxbl'medizitc 'Shoo arranged beneath bho lower longitudinal member, a pair of dingo-l arranged at oppofsito ldoo' of' the girder and extending from. tho ends of the 4,irder and beneath the shoe fllequid, suc 1 tension members con'iprising looped .rods thc loops of which eogcge thc aforoioid and moans 'for thc slice to ano. from the lower ing a ,wrst pluto and serios of adjusting 'screws `scrcwing through the .choc and hav ig becrig sigaiat tho thrust piglio.

2l.. A, skeleton reinforcing fraruo for: cou-- crete buildings: @supervising ver'ziccl c mons, fittings Seemed thereto and oririg sulppgi foru girdcr, a crusziod gil-der cof'ziipiusil tubing, lateral attach` 'brackets oo ings, 'an ioiemncdiot'o strut interposed bemongbom, an intermediate shoe:

beneotli isha lower longitudinal rfiipb'er, @pair of diagonal tension members a it opposilo sides of the glider and. fiom'the cnds of the girdcr and -llrocththeA Shoo aforesaid such ioiisou looped rods tho loops late-ml bracket@ aforo-- adjusting 'also shoe to rom .the 'lo'wcr .lon itudmal member, me comprioing a olii-usc plaine sind aY f djusting'sorews sore wing tlircuvh aim' no ilvand hauling bearing ogcinsit t o ate. .-QQE :skeleton reiniorcing frame for concompriszing gl; wluohvengago the dffagld.' means for Secured thereto and forming n sup" rder, a trussed glider con'iprising sklefo'n reinforcing from@ forcono buildings li'cor'nprising vertinl. columns, 'secured thereto and stormingnJ sop" or' ggirder, a. mussed. girder wmpms- 1 l'plr and o oidos of the. aforesaid,

flealripg opor! the runner strips andY lowor longitudinal 4truss.

I uuuubers, un iulermediulo HLruL interposed belwccu .Quid members, upper und lower longiitudiuul limiting Hlripf; zirrsuxgcd ou the lop ol' the upper frime membcr und the bottom ol llu: luwm' Hum: member, und provided willi runner lugnvfi, uu'l multiple braciugs of wim uouud in crofricd riluliiou :wound llie longiludinul membrrs und lowing' bearing upou (he. ruuuer .strips und around Llie runner l ugs.

:ll/l, A Skelclou reinforcing [mmc for concrele buildings comprising vertical columns, fittings'scoured (.lxureto und harming u sup fiori; for u girclci', u tru-ucd girder comprising upper und lower longiludinal truss members, lulerul ufitrichizig bruclicLs on the oidos il the u 'urosaid liitinpjfs, mi ioicrmediutc stru-f, iu'orpofscil bclwci'zn said members, ou iiuorxuediule shoe iria-rugged benor'ith the lower longiliauliiml iumulufr, pair of dingorml tension. momlrs; arranged. aft opposite sides of llie gii-dcfr and cr riding from the ends of the girdor :md ,noutli the Shoo aforosuid, such mob-ion ,members comprising loopcrl rods tho loims. of which engage the lcteml bracket lilou. nifl, upper und lower loi Ludinul licurif urmngcel ou ifho iup of llic oppor t u ma. Aibor and tbc bot ioni thc lower troie-L immbor .nel provided willi runner lugs, oud u diagoud'i bracing of wire wound :Mound the lougitcdiiml membels and having bcurizig ufioo the runner srps und around the ruizgor lugs.

25, A skeleton rein forcing from@ for concrete buildinge comprising vertical columns, li-tinge; secured thor-elo and forming a. Sup pori; for girder, a trussod girder comprising @spor and lower lougimduml truss u1emhors, .lateral atmohiiig brackets on the sides of 'the ooreaiol litliiigs, mi intermediate strut interposed l'ieiweon said members, un intermediate shoe arranged. bencath the lower longitudinal member, a pulir of diagonal ton'- 'sion members arrangrd or oppooito Sides of the girder and extonding from the ends of the girder und beneath the shoe aforesaid, Such tension members comprising looped lrods the loops ofwl'eicli engage the lateral brackets aforesaid, oppor and lower longitudinal bombing strips arranged ou. the iop of the upper truss member Mld. l.lle'"bottom of the lower truss member and provided with ruimer lugs, :and multiplo diagonal braoings of wir@ Wound around. the longitudinal truco members and bowing bearing upon the runner strips and around the ruimer lugs.

26. A, skeleton. roinforcing' frame for co11- croie buildings comprising vertical columns, fittings seeurod thereto and forming a support for a girder, o crossed girder compri ingl u per and lower longitudinal truss mem` bers ormod of round tubing. lateral attaching brackets on the sides of the aforesaid fittinkp, an intermediate Strut inter osecl be tween-said members, en intermeiato shoe arranged beneath the L ver longitudinal member, a pair of diagonal tensionmembers arran ed at opposite sides of the girder and exten in from the ends of the girder and beneath t e shoe aforesaid, such tension members comprisin looped rods the loops .of which en age te lateral brackets aforesaid, upper an lower longitudinal bearing strips arranged on the top of the upper truss member and the bottom of the lower truss `meniber and rovided with runner lugs, and a diagonal racing of wire wound around the longitudinal truss members and having bearing upon the runner strips and around the runner lu 27. A seleton reinforcing frame for' concrete buildings comprising vertical columns,

secured thereto and forming a supttings port or a girder, a trussed girder comprising u per and lower lon itudinal truss members ormed of round tu ing, lateral attaching brackets on the sides of the aforesaid fittings, an intermediate strut inter osed between said members an interme iate s hoe arranged beneath the lower longitudinal member, a pair of diagonal tension members arran ed at opposite sides of the girder and exten ing from the ends of the girder and beneath the shoe aforesaid, such tension members comprising looped rods the loops of which engage the lateral brackets afore-- said, upper and lower longitudinal bearing strips arran ed on the top of the upper truss membeigaii the bottom of the lower truss member and provided with runner lugs, and multiple diagonal bracings of wire wound around the longitudinal truss members and having bearing upon the runner strips and around the runner lu 28. A skeleton reinisrcing frame for concrete buildings comprising vertical columns, {ittin s secured thereto and forming a support or a girder, a trussed girder comprising upper and lower longitudinal truss members, lateral attaching brackets on the sides of the aforesaid fittings, an intermediate strut interposed between said members, an intermediate shoe arranged beneath the lower longitudinal member, a pair of diagohal tension members arrangedat-oppositeside of the girder and extending from the lends of the girder and beneath the shoe aforesaid, such tension members comprising loo ed rods the loops of which engage the latera brack-l ets aforesaid,means or adjustingl the shoe to and from the lower longitudine member, upper and lower longitudinal bea'g1 strips arranged on the top of the upper y, member and the bottom of the lower truss member, and rovided with run: er lugs, and a diagonal racing of wire wound around the longitudinal members and havin bearing upon the runner strips and aroun the runnel' lugAs.

29: skeleton reinforcing frame foi` con- L 31. A skeleton reinforcing frame crete buildings comprising vertical columns, (ittin secured thereto and forming a support or a girder, a trusseddgirder comprising upper and lower longitu inal truss members formed of round tubin ,lateral attaching brackets on the sides o the aforesaid fittings, an intermediate strut inte osed between said members arranged beneath t e lower longitudinal member, a pair of diagonal tension meinbers arra at opposite sides of thegirder and ex nding in the ends of the girder and beneath the shoeV aforesaid, 'such tension members comprising looped rods the loops of which en ge the lateral brackets aforesaid, means or adjustin the shoe to and from the lower lon tu nal member,

an intermediate shoe upper and lower longitu mal bearing strips arranged on the top of the upper truss meinber and the bottom of thelower truss member and rovided with runner lugs, and a diagonal racing of wire wound around the longitudinal members and havin bearing upoili the runner strips and aroun the runner u 30. skeleton reinforcing frame for concrete buildings comprising vertical columns,

fittings secured thereto and forming a support ing u per and lower longitu al mem rs, latera attaching brackets on the sides of the aforesaid fittings, an intermediate strut inter osed between said members, an interme iate shoe arranged beneath the lower longitudinal member, a pair of diagonal tension members arranged at opposite sides of the girder and extending 4from the engds of the girderfand beneath the .shoe aforesaid such tensioii members comprising loo rods the loo'ps of which engage the vlateral brackets aforesaid, means for adjusting the shoe to and from the lower longitu inal member, the same comprising a thrust plate and a series of adu'sting screws sere through the shoer an havinglbearing aga the thrust plate, upper and ower longitudinal bearing strips arranged on the p of or a girder, a trussed 'rder com riss the upper truss member and the bottom of v the lower truss member andprovided with runner lugs, and a diagonal bracing of wire wound around the longitudinal members ,and having bearing upon the runner strips and aroun the runner lugs. 4 t for ooncrete buildings'comprising Amrtical columns, fittings secured thereto andeforming a support or a girder, a trussed1 er comprising upper and lower longitu inal truss members formed of round tubing, lateral attachin brackets on the sides of the aforesaid ttings, an intermediate strut inter pose between said membe an intermediate slice arranged beneath tudinal member, pair of diagonal tension members a at opposite sides' ofthe e lower longig lil) aforesaid, means for adjustin girder and extendin from the ends of the bers, an intermediate strut interposed begirder and beneath t e shoe aforesaid, such tension members comprising looped rods the loops of which engage the lateral brackets the'shoe to and from the lower lon 'tu mal member, the sume comprising a t rust late and a series of adjusting screws screwing through the shoe and having bearing against the thrust plate, upper and lower longitudinal bearing strips arranged on the top of the upper truss member and the bottom of the lower truss member and provided with runnerV lugs, and a, diagonal bracing of wire wound around the longitudinal members and having bearing upon the runner strips and around the runner lu Y A skeleton reinrcing frame for concrete buildings comprising vertical columns, fittings secured thereto and forming a support for a girder, artrussed girder comprising upper and lower longitudinal truss memtween said members, lateral attaching brackets on the sides of the fittings, the same comprising integral studs on the fittings separate runner brackets recessed to fit said studs and a bolt securing the brackets in place, an intermediate shoe arranged beneath the lower longitudinal member, and a pair of diagonal tension members arranged at opposite sides of thee irder and extending frm the ends of the glrder and beneath the siiee aforesaid, such tension members con prising looped rods the loops of which engage the lateral attaching brackets aforesai Si ned at Chicago, Ill., this 2nd day of Octoier, 1907.

GEORGE M. GRAHM.

Witnesses ROBERT BURNS, A FRANK S. REID. 

